{"record":{"id":"99a541acbfb7a0b1","repo":"nautechsystems/nautilus_trader","slug":"contract-address-should-be-set-in-logs-99a541","errorCode":null,"errorMessage":"Contract address should be set in logs","messagePattern":"Contract address should be set in logs","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/adapters/blockchain/src/exchanges/parsing/uniswap_v3/burn.rs","lineNumber":95,"sourceCode":"\n    if let Some(data) = &log.data {\n        let data_bytes = data.as_ref();\n\n        // Validate if data contains 3 parameters of 32 bytes each\n        if data_bytes.len() < 3 * 32 {\n            anyhow::bail!(\"Burn event data is too short\");\n        }\n\n        // Decode the data using the BurnEventData struct\n        let decoded = match <BurnEventData as SolType>::abi_decode(data_bytes) {\n            Ok(decoded) => decoded,\n            Err(e) => anyhow::bail!(\"Failed to decode burn event data: {e}\"),\n        };\n\n        let pool_address = Address::from_slice(\n            log.address\n                .clone()\n                .expect(\"Contract address should be set in logs\")\n                .as_ref(),\n        );\n        let pool_identifier = PoolIdentifier::Address(Ustr::from(&pool_address.to_string()));\n        Ok(BurnEvent::new(\n            dex,\n            pool_identifier,\n            extract_block_number(log)?,\n            extract_transaction_hash(log)?,\n            extract_transaction_index(log)?,\n            extract_log_index(log)?,\n            owner,\n            tick_lower,\n            tick_upper,\n            decoded.amount,\n            decoded.amount0,\n            decoded.amount1,\n        ))\n    } else {","sourceCodeStart":77,"sourceCodeEnd":113,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/blockchain/src/exchanges/parsing/uniswap_v3/burn.rs#L77-L113","documentation":"parse_burn_event_hypersync unwraps log.address with expect() because the emitting contract address identifies the Uniswap V3 pool for the BurnEvent. A Hypersync log without an address is treated as impossible for well-formed Burn logs, so the parser panics rather than returning a result; this panic is documented in the function's # Panics section.","triggerScenarios":"Passing a HypersyncLog with address == None to parse_burn_event_hypersync — typically from a Hypersync query that omitted the address column or a manually built log fixture.","commonSituations":"Query projection mistakes when collecting raw logs; Hypersync client upgrades changing field nullability; test harnesses constructing partial HypersyncLog values.","solutions":["Request the address field in the Hypersync log selection so every log row includes it.","Pre-filter logs lacking an address before dispatching to event parsers.","Change the parser to return anyhow::Result error via ok_or instead of panicking."],"exampleFix":"// before\nlet pool_address = Address::from_slice(\n    log.address.clone().expect(\"Contract address should be set in logs\").as_ref(),\n);\n// after\nlet raw_address = log.address.as_ref()\n    .ok_or_else(|| anyhow::anyhow!(\"missing contract address in burn log\"))?;\nlet pool_address = Address::from_slice(raw_address.as_ref());","handlingStrategy":"validation","validationCode":"if log.address.is_none() {\n    log::warn!(\"skipping burn log without contract address\");\n    return Ok(());\n}\nlet event = parse_burn_event_hypersync(dex.clone(), &log)?;","typeGuard":"fn has_address(log: &HypersyncLog) -> bool {\n    log.address.is_some()\n}","tryCatchPattern":"match parse_burn_event_hypersync(dex, &log) {\n    Ok(event) => handle(event),\n    Err(e) => log::error!(\"failed to parse burn log: {e:#}\"),\n}\n// Note: missing address panics via expect(); pre-check log.address before calling.","preventionTips":["Include address in Hypersync projections for burn event ingestion.","Add a central address-presence check in the log-processing pipeline.","Verify Hypersync client upgrades do not change log field nullability."],"tags":["panic","missing-field","hypersync","blockchain-logs","rust"],"backgroundTag":"null-argument","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}